I think an argument could be made to set it to the date of death of the author. I agree with the other guy that it should only apply to commercial works though.
I also don’t think that the copyright should be transferable. The trading of ideas is an absurd concept to me. But then us humans do a lot of absurd things so I guess it’s just par for the course.
That’s an oversimplification. All works are derivative to some extent. There’s a huge difference between taking inspiration from something, to taking the characters and setting from something. Particularly if you’re intending to make a profit.
If an author makes something that a large number of people enjoy, why shouldn’t they be able to make money off it for the rest of their life? Why exactly should an individual give up the rights to their creation simply so that someone else can use their characters and their worlds?
To be clear, I’m talking solely on an individual level. I think the system we have where a corporation can own an idea is very broken. I’m also talking about this from a perspective of the world we currently live in. In an ideal world where money wasn’t the endgame for survival, ideas would flow more freely and nobody would need to care. But that’s not the world we live in.